When person A sees person B doing something bad and threatens to spill the beans. Person B responds with his or her own threat of blackmail, to which person A responds with even more blackmail. Can escalate to death threats.

Usually takes place between siblings or people who know each other quite well.

Also, this can take place between two or more parties. Various classifications of tattle battles include, but are not limited to the following: minor skirmish, big team battle, and nuclear warfare.

Tattle battles can lead to bickering, verbal and physical attacks, including being called such epithets as bitchass, and death.

My girlfriend's best friend caught me fucking 69 various guys and threatened to tell my girlfriend that I was actually gay. That would be completely unnecessary, so I had to start a tattle battle with that little bitch.